I don't have Medicaid and went through Blue Cross, but I actually gained a small amount of weight during the phase leading up (5 lbs or so). However, during the pre-op liver shrink diet, it is virtually impossible to not lose weight. I lost 20 pounds in three weeks. If I had shown up and gained weight or maintained after I was supposed to be on that pre-op diet, I'm sure they would've turned me away, because it would've been clear that I hadn't done the surgery preparation without even seeing my liver.